Water soluble disperse dyes of either monoazo or anthraquinone types containing the carboxymethylsulfonylgroup(-SO2CH2COOH)were synthesized.Ammonium salts of this type of dyes are more soluble thanother salts.These ...Water soluble disperse dyes of either monoazo or anthraquinone types containing the carboxymethylsulfonylgroup(-SO2CH2COOH)were synthesized.Ammonium salts of this type of dyes are more soluble thanother salts.These dyes are suitable for pad dyeing or printing on polyester fiber and polyester/cottonblends in either weak acid,neutral or weak alkali medium without a dispersing agent.The formation of-SO2CH3 group from -SO2CH2COOH group after fixing on the fiber was proved.展开更多
A series of disperse dyes bearing ether groups have been synthesized. The visible absorption spectra of them were studied, their fastness on polyester microfibres were investigated.
Calcium-alginate pectin entrapped bitter gourd peroxidase (BGP) has been employed for the treatment of disperse dyes: Disperse Brown 1 (DB 1) and Disperse Red 17 (DR 17). Peroxidase alone was unable to decolori...Calcium-alginate pectin entrapped bitter gourd peroxidase (BGP) has been employed for the treatment of disperse dyes: Disperse Brown 1 (DB 1) and Disperse Red 17 (DR 17). Peroxidase alone was unable to decolorize DR 17 and DB 1. However, the investigated dyes were decolorized maximally by BGP in the presence of 0.2 mmol/L redox mediator, violuric acid (VA). A slow decrease in percent decolorization was observed when VA concentration was higher than 0.2 mmol/L which could likely be due to the high reactivity of its aminoxyl radical ( N–O . ) intermediate, that might undergo chemical reactions with aromatic amino acid side chains of the enzyme thereby inactivating it. Maximum decolorization of the dyes was observed at pH 3.0 and 40°C within 2 hr of incubation. Immobilized peroxidase decolorized 98% DR 17 and 71% DB 1 using 35 U of BGP in batch process in 90 min. Immobilized enzyme decolorized 85% DR 17 and 51% DB 1 whereas soluble enzyme decolorized DR 17 to 48% and DB 1 to 30% at 60°C. UV-visible spectral analysis was used to evaluate the degradation of these dyes and their toxicity was tested by Allium cepa test. The generally observed higher stability of the bioaffinity bound enzymes against various forms of inactivation may be related to the specific and strong binding of enzyme with bioaffinity support which prevents the unfolding/denaturation of enzyme. Thus entrapped peroxidase was found to be effective in the decolorization of the investigated dyes.展开更多
A series of phenylazo-β-naphthol-containing sulfonamide disperse dyes were prepared from C.I.Acid Orange 7 by successive reactions of chlorination and amination,and their chemical structures were characterized by FTI...A series of phenylazo-β-naphthol-containing sulfonamide disperse dyes were prepared from C.I.Acid Orange 7 by successive reactions of chlorination and amination,and their chemical structures were characterized by FTIR,1H NMR,and mass spectrometry.The dyes were applied to coloring of knitted fabrics from fine denier polypropylene fibers by exhaust dyeing and their optimal dyeing conditions,such as dyebath pH,dyeing temperature,dyeing time,and dye concentration were investigated in detail.Then,dye exhaustion,color strength,and color fastnesses of the dyes on the fibers were assessed and summarized.In view of dye exhaustion and color strength of the sulfonamide dyes on fine denier PP fabrics,90℃ was selected as the best dyeing temperature at dye concentration below or equal to 3.0%owf.For achieving higher color strength,130℃ was the better choice when the dye concentration was above 3.0%owf.The sulfonamide dyes,especially secondary sulfonamide dyes,exhibited superior dye exhaustion and color fastnesses to washing,sublimation,and rubbing on fine denier PP fabrics in comparison to C.I.Solvent Yellow 14 bearing the same chromophore but without sulfonamide group.展开更多
Technical properties of two naphthalimide based disperse dyes on nylon 6 and polyester fibers were investigated in the presence of urea. The two naphthalimide based disperse dyes were synthesized. The dyes were purifi...Technical properties of two naphthalimide based disperse dyes on nylon 6 and polyester fibers were investigated in the presence of urea. The two naphthalimide based disperse dyes were synthesized. The dyes were purified and then fully characterized using 1H-NMR, FTIR and melting point analysis. Dispersion of the dyes was prepared in water and applied on nylon 6 and PET fibers. The dyes offered good build-up properties on the substrates. In order to increase dye adsorption of the substrates, urea was added into the dyebath. By adding urea, the dye adsorption of polyester was increased significantly, while the increase of that of nylon 6 was not marked. The dyes showed good fastness properties on the substrates.展开更多
The target production were obtained by coupled reaction of 3-amino-5-nitro-2, 1- benzoisothiazole,as a diazo component,with some derivatives of anilline or some derivatives of naphthylamine sulfonic acid in proper con...The target production were obtained by coupled reaction of 3-amino-5-nitro-2, 1- benzoisothiazole,as a diazo component,with some derivatives of anilline or some derivatives of naphthylamine sulfonic acid in proper condition. Their colors are from red to violet. They have excellent tight property. The chemical and physical test of production verified that they were some unique properties.展开更多
Double-layer organic electroluminescent devices have been constructed. A new fluorescent dye, 9,10-bis(phenylethynyl)anthracence, was chosen as the dopant which was molecularly dispersed in the polymer film, and green...Double-layer organic electroluminescent devices have been constructed. A new fluorescent dye, 9,10-bis(phenylethynyl)anthracence, was chosen as the dopant which was molecularly dispersed in the polymer film, and green light was observed from the device with luminance of 130cd/m(2) at 17V.展开更多
Alizarin,extracted from rubia cordifolia,is a green natural dye.However,its application has been limited by its poor water solubility and pH sensitivity.In this study,linear sulfonic anionic surfactant(LAS)had been st...Alizarin,extracted from rubia cordifolia,is a green natural dye.However,its application has been limited by its poor water solubility and pH sensitivity.In this study,linear sulfonic anionic surfactant(LAS)had been studied as a new dispersant,which promoted the dyeing of alizarin on fabrics under mild conditions.Ultraviolet visible(UV-vis)spectra and Fourier transform infrared(FTIR)spectra confirmed appropriate bonding between alizarin and LAS,and the nano particle size analysis showed that LAS could promote the dispersion of alizarin in aqueous solution.Under the optimized condition of alizarin 4.8%on mass of fabric(omf)and LAS solution 2×10^(-2)mol/L,the fabrics were dyed with alizarin at room temperature and pH neutral conditions.The dyed fabrics had good washing fastness and ironing fastness.展开更多
In this study,N,N'-di-(2-methylphenyl)malonamide was synthesized and reacted with polyphosphoric acid to afford 8-methyl-4-hydroxyl-2-quinolone.Eight novel azo disperse dyes were then synthesized by linking diazoti...In this study,N,N'-di-(2-methylphenyl)malonamide was synthesized and reacted with polyphosphoric acid to afford 8-methyl-4-hydroxyl-2-quinolone.Eight novel azo disperse dyes were then synthesized by linking diazotized p-substituted aniline derivatives with 8-methyl-4-hydroxyl-2-quinolone.The solvatochromism of these azo dyes in various solvents was evaluated.All the compounds were then evaluated for their antibacterial activity against four bacteria,namely.Bacillus subtilis.Micrococcus luteus, Salmonella enterica,and Pseudomonas aeruginosa.The results showed that some of these compounds have high levels of antibacterial activity.展开更多
A yellow, alkali-clearable azo disperse dye containing a carboxylic ester moiety was readily synthesized from the reactant p-aminobenzoic acid by successive diazotization, coupling reaction, chlorination and esterific...A yellow, alkali-clearable azo disperse dye containing a carboxylic ester moiety was readily synthesized from the reactant p-aminobenzoic acid by successive diazotization, coupling reaction, chlorination and esterification with ethanol. Then its molecular structure was characterized by FTIR,1H NMR,13 C NMR,mass spectrometry and elemental analysis. The synthesized dye and a similar control dye containing the acylamide moiety(I) were applied to dyeing poly(ethylene terephthalate) fabric and their washing and rubbing fastness properties with different post-treatment methods(reduction clearing and alkali clearing) were examined and compared. It is found that the ester-containing disperse dye shows good alkali-clear ability on poly(ethylene terephthalate) fabric and contaminates little to environment due to the absence of reductants, as well as low toxicity and easy recycling of the hydrolysates.展开更多
文摘Water soluble disperse dyes of either monoazo or anthraquinone types containing the carboxymethylsulfonylgroup(-SO2CH2COOH)were synthesized.Ammonium salts of this type of dyes are more soluble thanother salts.These dyes are suitable for pad dyeing or printing on polyester fiber and polyester/cottonblends in either weak acid,neutral or weak alkali medium without a dispersing agent.The formation of-SO2CH3 group from -SO2CH2COOH group after fixing on the fiber was proved.
文摘A series of disperse dyes bearing ether groups have been synthesized. The visible absorption spectra of them were studied, their fastness on polyester microfibres were investigated.
基金Aligarh Muslim University, Aligarh is gratefully ac knowledged for providing University Grants Commission, New Delhi, sponsored fellowship to one of us (Rukhsana Satar)
文摘Calcium-alginate pectin entrapped bitter gourd peroxidase (BGP) has been employed for the treatment of disperse dyes: Disperse Brown 1 (DB 1) and Disperse Red 17 (DR 17). Peroxidase alone was unable to decolorize DR 17 and DB 1. However, the investigated dyes were decolorized maximally by BGP in the presence of 0.2 mmol/L redox mediator, violuric acid (VA). A slow decrease in percent decolorization was observed when VA concentration was higher than 0.2 mmol/L which could likely be due to the high reactivity of its aminoxyl radical ( N–O . ) intermediate, that might undergo chemical reactions with aromatic amino acid side chains of the enzyme thereby inactivating it. Maximum decolorization of the dyes was observed at pH 3.0 and 40°C within 2 hr of incubation. Immobilized peroxidase decolorized 98% DR 17 and 71% DB 1 using 35 U of BGP in batch process in 90 min. Immobilized enzyme decolorized 85% DR 17 and 51% DB 1 whereas soluble enzyme decolorized DR 17 to 48% and DB 1 to 30% at 60°C. UV-visible spectral analysis was used to evaluate the degradation of these dyes and their toxicity was tested by Allium cepa test. The generally observed higher stability of the bioaffinity bound enzymes against various forms of inactivation may be related to the specific and strong binding of enzyme with bioaffinity support which prevents the unfolding/denaturation of enzyme. Thus entrapped peroxidase was found to be effective in the decolorization of the investigated dyes.
基金the National Outstanding Youth Foundation of China(No.20525620)Program for Changjiang Scholars and Innovative Research Team in the University(IRT0711)Science Foundation of Zhejiang Sci-tech University(ZSTU)for financial support.
文摘A series of phenylazo-β-naphthol-containing sulfonamide disperse dyes were prepared from C.I.Acid Orange 7 by successive reactions of chlorination and amination,and their chemical structures were characterized by FTIR,1H NMR,and mass spectrometry.The dyes were applied to coloring of knitted fabrics from fine denier polypropylene fibers by exhaust dyeing and their optimal dyeing conditions,such as dyebath pH,dyeing temperature,dyeing time,and dye concentration were investigated in detail.Then,dye exhaustion,color strength,and color fastnesses of the dyes on the fibers were assessed and summarized.In view of dye exhaustion and color strength of the sulfonamide dyes on fine denier PP fabrics,90℃ was selected as the best dyeing temperature at dye concentration below or equal to 3.0%owf.For achieving higher color strength,130℃ was the better choice when the dye concentration was above 3.0%owf.The sulfonamide dyes,especially secondary sulfonamide dyes,exhibited superior dye exhaustion and color fastnesses to washing,sublimation,and rubbing on fine denier PP fabrics in comparison to C.I.Solvent Yellow 14 bearing the same chromophore but without sulfonamide group.
文摘Technical properties of two naphthalimide based disperse dyes on nylon 6 and polyester fibers were investigated in the presence of urea. The two naphthalimide based disperse dyes were synthesized. The dyes were purified and then fully characterized using 1H-NMR, FTIR and melting point analysis. Dispersion of the dyes was prepared in water and applied on nylon 6 and PET fibers. The dyes offered good build-up properties on the substrates. In order to increase dye adsorption of the substrates, urea was added into the dyebath. By adding urea, the dye adsorption of polyester was increased significantly, while the increase of that of nylon 6 was not marked. The dyes showed good fastness properties on the substrates.
文摘The target production were obtained by coupled reaction of 3-amino-5-nitro-2, 1- benzoisothiazole,as a diazo component,with some derivatives of anilline or some derivatives of naphthylamine sulfonic acid in proper condition. Their colors are from red to violet. They have excellent tight property. The chemical and physical test of production verified that they were some unique properties.
文摘Double-layer organic electroluminescent devices have been constructed. A new fluorescent dye, 9,10-bis(phenylethynyl)anthracence, was chosen as the dopant which was molecularly dispersed in the polymer film, and green light was observed from the device with luminance of 130cd/m(2) at 17V.
基金National Key Research&Development Program of China(No.2017YFB0309100)。
文摘Alizarin,extracted from rubia cordifolia,is a green natural dye.However,its application has been limited by its poor water solubility and pH sensitivity.In this study,linear sulfonic anionic surfactant(LAS)had been studied as a new dispersant,which promoted the dyeing of alizarin on fabrics under mild conditions.Ultraviolet visible(UV-vis)spectra and Fourier transform infrared(FTIR)spectra confirmed appropriate bonding between alizarin and LAS,and the nano particle size analysis showed that LAS could promote the dispersion of alizarin in aqueous solution.Under the optimized condition of alizarin 4.8%on mass of fabric(omf)and LAS solution 2×10^(-2)mol/L,the fabrics were dyed with alizarin at room temperature and pH neutral conditions.The dyed fabrics had good washing fastness and ironing fastness.
文摘In this study,N,N'-di-(2-methylphenyl)malonamide was synthesized and reacted with polyphosphoric acid to afford 8-methyl-4-hydroxyl-2-quinolone.Eight novel azo disperse dyes were then synthesized by linking diazotized p-substituted aniline derivatives with 8-methyl-4-hydroxyl-2-quinolone.The solvatochromism of these azo dyes in various solvents was evaluated.All the compounds were then evaluated for their antibacterial activity against four bacteria,namely.Bacillus subtilis.Micrococcus luteus, Salmonella enterica,and Pseudomonas aeruginosa.The results showed that some of these compounds have high levels of antibacterial activity.
基金supported by the National Natural Science Foundation of China(Nos.51173168,21106135)Zhejiang Provincial Key Innovation Team(No.2010R50038)+1 种基金Zhejiang Provincial Top Key Academic Discipline of Chemical Engineering and Technology of Zhejiang Sci-Tech University‘‘521’’ Talent Project of Zhejiang Sci-Tech University
文摘A yellow, alkali-clearable azo disperse dye containing a carboxylic ester moiety was readily synthesized from the reactant p-aminobenzoic acid by successive diazotization, coupling reaction, chlorination and esterification with ethanol. Then its molecular structure was characterized by FTIR,1H NMR,13 C NMR,mass spectrometry and elemental analysis. The synthesized dye and a similar control dye containing the acylamide moiety(I) were applied to dyeing poly(ethylene terephthalate) fabric and their washing and rubbing fastness properties with different post-treatment methods(reduction clearing and alkali clearing) were examined and compared. It is found that the ester-containing disperse dye shows good alkali-clear ability on poly(ethylene terephthalate) fabric and contaminates little to environment due to the absence of reductants, as well as low toxicity and easy recycling of the hydrolysates.